victoriaragbeer victoriaragbeer
  • 07-06-2015
  • Mathematics
contestada

Find the missing angle and side measures of DABC, given that mDA=65, mDC=90 and CB=15

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annabellthegrea
annabellthegrea annabellthegrea
  • 07-06-2015


You know that all four sided polygons have a total angle measure of 360.

add all the sides you have:

65 + 90 + 15 = 170

Subtract 170 from total(360)

360 - 170 = 190

Missing angle: 190

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dCODEr
dCODEr dCODEr
  • 07-06-2015
[tex]360=65+90+15+x[/tex]
[tex]360=170+x[/tex]
     -170    -170
[tex]190=x[/tex]
[tex]mCA=190 degrees[/tex]

I cant give side lengths until I know a couple, and then that would require some triginometry, which I don't feel like doing right now, to be frank.
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